Imitation beads refer to all or part of artificial imitation. Because of their strong simulation, it is easy to distinguish between true and false. Therefore, it is necessary to know some simple methods to distinguish pearls from imitation pearls.
Pearls are refreshing, but they are not smooth when bitten by cool teeth, but they have a feeling of grinding sand. If you bite hard, the sound is crisp, there is no dented tooth marks on the surface, and there is no bead layer falling off locally. There are natural machine lines on the surface of pearls, so it can be seen that the luster color is uneven anyway. In a string of pearl necklaces, its size) Vision: True pearls are irregular in shape, showing translucent jade white, yellow white, light blue, flesh red and other natural and unique colorful fluorescent luster; Most of the fake beads are glass imitations, with regular shapes and the same size. Generally, the surface of beads is coated with "polishing solution" made of silver powder or fish scales, which is monotonous in color and lacks halo.
(2) Handfeel: Zhu Zhen is very cool, even if the weather is hot, the tentacles feel very cool; Pseudobeads are sticky and slippery to the touch when they are tentacles. If it is pure glass imitation beads, its specific gravity is greater than that of pearls. If it is wax-filled glass imitation beads, the specific gravity is only about half of that of pearls.
(3) firing: the pearl is fired on a gas lighter, and the surface is intact and the luster is still the same; Black smoke will appear on the surface of the false beads after burning, and the gloss loss will be different, which has the natural multicolored pearl luster. At the same time, observing the pearl hole, the pearl is sharper at the drill hole because of its hardness.
Imitation beads are slippery and wet, and they bite smoothly with your teeth. When bitten hard, dented teeth marks will appear on the surface, and even the coating will fall off locally. The surface of imitation beads is slightly convex, lacking the unique luster of pearls, and generally has good roundness. At the same time, because the imitation beads are soft, there will be depressions at the drilling site.
Question 2: How to tell the authenticity of a pearl necklace? Choosing pearls mainly depends on the following aspects:
1. The rounder the better, it's best to put it on a horizontal glass, it will keep rolling by itself.
2. The brighter the luster, the better, with rainbow-like halo, even.
There are many colors, the most common ones are white and milky white. There are few black pearls in freshwater cultured pearls, and roses, pink pearls and golden pearls are also precious.
4. The fewer flaws, the better. In the process of pearl growth, pits and protrusions are usually formed for various reasons, so the smoother the surface of a good pearl, the better.
5. The bigger the pearl particles, the better. Generally, it takes more than 5-6 years to harvest cultured pearls, and the big ones are harvested in 10 years.
How to identify the authenticity of pearls;
1. False pearls are generally made of two materials: 1. Made of glass balls and coated with a substance called guanosine, it will emit a luster similar to fish scales and a rainbow-like glow. 2. The thick shell is ground, very round, and has a pearl-like luster.
Second, the characteristics of two kinds of fake pearls: 1. "pearls" made of glass will look bright and have regular shapes. If it is a necklace, each bead is good and the size will be the same. If you look closely, you will find that its color is dead, not as unpredictable as a real pearl. If you feel it, you will find these "pearls" a little greasy and not as refreshing as real pearls. 2. The pearls made of shells are also round, regular in shape, not too small in size, and have the luster of pearls, which can be said to be difficult for ordinary people to distinguish. But if you carefully observe its luster, you will find that the light it emits is parallel stripes from any angle. This is because the structure of shells is parallel, while the cross-sectional structure of pearls is concentric.
Question 3: How to distinguish real pearls from fake pearls! Pearls are divided into natural pearls and cultured pearls, and cultured pearls are divided into seawater pearls and freshwater pearls. Natural pearls are low in output and expensive; Moreover, cultured pearls can be produced in large quantities, so the price is much lower. The main difference between them is the inner core of natural pearls and cultured pearls. The inner core of natural pearls is often just some sand or parasites, or even no inner core. However, the inner core of cultured pearls is artificially made large round beads, so the outer coating is thin. The poor roundness of natural pearls is due to the random growth environment, and foreign bodies rarely roll in the nucleus. The inner core of cultured pearls is round, so the roundness is better after pearl formation. Natural pearls are transparent because of their long growth time, delicate texture, thick nacre, smooth skin and few "convex bubbles". For cultured pearls, the pearl layer is thin, the texture is rough, the luster is "wax-like", and there are often some uneven "bubbles" on the surface, so the transparency is poor. If it is a perforated pearl, observe the hole carefully with a magnifying glass. If it is a cultured pearl, you can usually see a brown line in the pearl, which is the dividing line between the inner core and the pearl layer that grows later.
At present, imitation pearls often appear in the collection market, which are generally made of glass beads coated with fish scale powder or silver powder. Their luster is obviously different from that of real pearls and their weight is also different. Wang Lisheng said that jewelry collectors can identify the authenticity of pearls according to the following points:
1. If it is beaded, its color, size, shape and luster are exactly the same, it is an artificial pearl. Because real pearls can't be consistent anyway.
2. The luster of real pearls is colorful like a rainbow. False pearls have a dull luster because their surfaces are coated.
3. The transparency of real pearls is good, while that of fake pearls is poor.
Touch with hands, real pearls have a smooth and cool feeling, while fake pearls have a warm and greasy feeling.
5. With the magnifying glass of 10 times, the growth texture can be seen on the surface of real pearls, while the fake pearls have no growth texture, only the coating can be seen.
Three simple methods to identify the authenticity of pearls
* * * Beautiful pearls are deeply loved by the world. Because there are often counterfeit pearls in the market, consumers are often cheated. We specially provide readers with several simple identification methods.
Tooth grinding method: instead of the smooth surface of pearls, it will feel slippery if you grind them gently with your teeth, while the skin of natural pearls is covered with layers of calcium carbonate, which will make a rustling sound when you grind them with your teeth, but this method is not recognized by the industry because teeth will damage the surface of pearls.
Visual observation: With the naked eye or ten times magnifying glass, we can see that the surface of substitute pearls is smooth, while pearls generally have slight irregularities or defects. The substitute pearls are molded from a batch of plastic materials, and each pearl is quite neat, but the surface of the pearl is different, and its body color or luster is slightly different.
Weighing method: the specific gravity of seawater pearls is 2.54-2.78, that of freshwater pearls is 1.77 1.86, and the substitute pearls are made of plastic with a specific gravity of 0.95. So when you look at it with a hand scale, you can feel that the substitute pearls are lighter and heavier.
1. None of the pearl necklaces are exactly the same color. Every grain is taken from clams, so it must have a different color. The fake pearls are all painted with color, so each pearl is exactly the same color.
2. After the fake shell beads are made, punch holes, string them together with lines, and then color them. Observe the holes of the beads carefully to see if there is paint gathering in the holes and lines, or if there is paint peeling off outside the holes.
3. The forged beads feel smooth, and the two beads are gently rubbed against each other, which is very smooth, and the cultured beads feel a little frosty. If you only have one bead and want to know if you feel this way, you can try to touch it with your front teeth and you will feel the mystery.
4. When cultured pearls are strung together, under the irradiation of concentrated light source, the boundary line of the surface layer may be seen outside the small hole, especially if the pearl layer is thin, which is easier to see.
5. Forged pearls feel very hot in your hands; Real pearl neckline, it feels very cold in your hand; The surface of fake pearls will dissolve quickly when soaked in alcohol. Good luck and happiness!
Question 4: How to identify pearls? True and false pearls
The difference is easier. When two pearls rub against each other, the real pearl feels very astringent, while the fake pearl feels very slippery.
Natural pearls and cultured pearls
The difference is hard. In the past, natural pearls were usually identified by biting with teeth. If they feel astringent, they are natural pearls, otherwise they are cultured pearls. However, this method is easy to damage the pearl surface. The best way is to observe under a magnifying glass of 20-30 times. The surface of natural pearls shows fingerprint-like lines, while cultured pearls do not, showing orange peel-like appearance. In addition, at present, pure natural pearls are very rare, and most of them are cultured artificially, so the above method is no longer practical.
Freshwater pearls and mariculture pearls
Seawater pearls are * * * shaped, with good gloss and look like gems; However, freshwater pearls are mostly oblate, pear-shaped, rice-shaped and other irregular shapes with poor gloss.
Distinguish and appreciate
The value of pearls lies in their quality. The quality of pearls mainly includes color (skin color), luster (skin luster), shape, smoothness, and threading skills, which constitute the basis for judging the purchase of pearls.
colour
The color of pearls is preferably black with purple halo, or gold with rose halo, followed by silver, white and yellow hats.
Bright, shiny; Shine, shine
In terms of luster, top-grade pearls must have a strong pearl luster. Gloss is mainly determined by the quality of nacre, and also affected by the health status of shellfish, seawater temperature and growth time. When selecting pearls, examine them carefully under the lamp, turn them under the lamp, and reflect the silver luster.
body
Physically, the bigger the pearl, the better, and the rounder it is. People often say that "pearls are round and smooth" is the truth. Irregular pearls are cheap, but they have the highest plasticity. Many designers use them as the main materials and process them into creative shapes. Laozi Pearl (also called * * * Pearl), 1934, a super-large pearl found in Palawan Sea, Philippines, is irregular in shape. This natural pearl resembles China's image of Laozi, and its value is as high as $4.08 million.
level and smooth
It is best to have a smooth and delicate pearl surface, but such pearls are rare after all, and pearls will have some external defects more or less. Of course, defects will obviously affect the beauty of pearls and the maintenance of pearls, which should be used as the criteria for selection.
Question 5: How to identify the authenticity of natural pearls? How to distinguish natural pearls from artificial pearls?
First of all, look at the luster.
The halo reflected by nacre on the surface or inside of pearls from different places of origin is different. As the saying goes, pearl luster needs to be carefully tasted in combination with the real thing. Pearlescence is a unique luster, which is mainly reflected from the inner fine structure layer of pearls and diffracted by light. This luster can also be observed in the dark light without direct light, which is similar to observing the growth lines and inclusions inside the gem under the dark field gem microscope, reflecting that the pearlescent intensity of the pearl layer is particularly clear under the weak light irradiation. The light reflected by weak plastic is bright, but the process of painting is deceptive, so it should be carefully identified.
Second, observe the surface characteristics of pearls.
The number of pearl surface defects directly affects the beauty of pearls, but there are few pearls without defects. The different flaws of each pearl are just different from the birthmarks of other pearls, which provides a basis for distinguishing authenticity. The surface defects of pearls are defects or stripes. When a foreign body invades between nacreous layers, a defect will be raised on the surface. Sometimes it is necessary to observe carefully with a magnifying glass of 10 times, and some banded phenomena will always be found.
Third, touch with your hands.
False beads are greasy, real beads are cool, and hanging around the neck is cool.
Fourth, try grinding with teeth or two beads.
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As mentioned above, plastic beads will slip when grinding, but grinding pearls along the peak of teeth will feel sandy. If it is a good bead, this kind of sand feeling is particularly uniform, and the feeling is simply wonderful. This is because the crystals that make up the nacre are arranged in an orderly way, just like the roof panel, which is called tile arrangement in jargon, so rubbing it will make people feel like sand.
Fifth, try with fire.
When burning, the fake beads are fire-like, the burning surface is black smoke, and the surface bead layer falls off, while the real beads can't see the black smoke color on the burning surface, and the surface remains intact. As for the choice of pearls, first of all, it should be clear that freshwater pearls and seawater pearls belong to two different grades of goods, just like jade and jade, which cannot be compared. When choosing the same kind of beads, we should consider its color, luster and mother-of-pearl layer thickness, and consider its color, luster, mother-of-pearl layer thickness, shape defects (spots) and other factors to make our final choice.
colour
The pigment of pearl consists of several components. Its own pigments (such as white, cream, pink, black, etc. ). Generally, the primary color of seawater beads is white.
With yellow flavor), if the beads themselves are of good quality, manufacturers try to keep their true colors, but there are differences in color preferences among ethnic groups. If the beads are exported to Europe and America, they must be bleached. Among the black pearls, black is the best.
Buy natural pearls
As a gem, pearls can generally be evaluated and deleted from four aspects:
1, luster, accounting for 40% of the price;
2. Appearance, accounting for 30% of the price;
3. Size, accounting for 20% of the price;
4. Color, accounting for10% of the price;
(1) Pearl luster plays an extremely important role in the evaluation of pearls and is the key to determine the quality of pearls. According to the strength of luster, pearls can be roughly divided into three types:
1, strong luster: it appears in the first-class pearls, and the pearl surface is crystal clear and moist, with clear rainbows and visible objects.
2. Medium luster: It appears in secondary pearls, and the surface of pearls is basically transparent, and objects can be seen or partially seen.
3. Weak luster: It appears in tertiary pearls, and the pearl surface is pearlescent or weak pearlescent.
(2) According to different shapes, pearls can be divided into the following four categories:
1, regular round beads: also known as walking round beads, rolling round beads and fine round beads. The length-diameter difference is less than 1%.
2. Round beads: the difference between length and diameter is less than 1- 10%.
3. Elliptical beads: the difference between long and short diameters is less than 10-20%.
4. Special-shaped beads: called special-shaped beads, the difference between length and diameter is more than 20%. Special-shaped beads include steamed bread beads, falling beads, double beads, mother-child beads, horse teeth beads, oval beads, art beads and so on.
(3) The price of pearls varies greatly due to different particle sizes. The bigger the pearl, the higher its value.
(4) Pearl color includes body color and companion color. Body color is the inherent color of pearls, which is determined by the trace metal elements contained in pearls. Companion color is formed by the reflection and interference of light on the surface and inside of pearl, which is superimposed on the true color of pearl. Accompanied colors generally have halo colors. Generally speaking, the brighter, rounder, bigger and smoother pearls are ... >>
Question 6: How to tell the authenticity of pearls? Seawater pearls are dazzling and elegant, which can be as famous as precious stones and comparable to gold. Pearl necklace is a high-grade ornament favored by women, which not only makes people pleasing to the eye and adds charm, but also promotes health and beauty. Hainan is a famous pearl producing area. Many Chinese and foreign tourists who come to Qionghai are willing to buy Hainan pearls as souvenirs or gifts to relatives and friends, but they are often confused because they don't know the authenticity of pearls. In order to help tourists buy pearls with satisfactory quality and low price, this paper introduces some basic knowledge of pearls for reference when tourists buy pearls or pearl necklaces.
Pearls are divided into two categories: wild pearls and cultured pearls. At present, most pearls sold in the market are cultured pearls. Artificial culture of pearls is to artificially insert mature shellfish, such as white butterfly, black butterfly or Pinctada martensii, and then cultivate them in seawater for about one year, so that they can form pearl lines on nuts in the natural ecological environment according to the biological characteristics of shellfish. Artificial farming is hard, smooth and round, with sunny color. People usually divide pearls into two categories: pearls and treasures. Those weighing more than 2.5 grams are called treasures, and those weighing less than 2.5 grams are called pearls. Generally speaking, the longer the culture time, the bigger the core, the thicker the tread and the brighter the luster. The pearl produced by white butterfly shell has the best texture, and the first-class pearl still shines brightly even if it is placed in the dark or in the dark.
Because pearls are deeply loved by people and have high value, some people who are confused by interests use "fishy eyes and pearls" to make profits. They take fakes seriously, shoddy them and cheat passing tourists. In order to avoid being deceived, tourists can identify pearls by the following simple methods.
(l) Vision: pearls are irregular in shape and translucent, with natural and unique colorful fluorescent luster such as jade white, yellow white, light blue and flesh red; Most of the fake beads are glass imitations, with regular shapes and the same size. Generally, the surface of beads is coated with "polishing solution" made of silver powder or fish scales, which is monotonous in color and lacks halo.
(2) Handfeel: Zhu Zhen is very cool, even if the weather is hot, the tentacles feel very cool; Pseudobeads are sticky and slippery to the touch when they are tentacles. If it is pure glass imitation beads, its specific gravity is greater than that of pearls. If it is wax-filled glass imitation beads, the specific gravity is only about half of that of pearls.
(3) firing: the pearl is fired on a gas lighter, and the surface is intact and the luster is still the same; Black smoke will appear on the surface of the false beads after burning, which will lose its luster. (Source: Sea World)
Method for distinguishing pearl powder from real pearl powder
Pearl powder can play the role of health care and beauty, while fake pearl powder can not only protect health and beauty, but also endanger the health of consumers because of the excessive total number of Escherichia coli. So, how to identify its authenticity? Introduction is as follows:
High-quality pure pearl powder: raw materials are high-quality freshwater pearls, carefully selected and washed, produced according to drug quality standards, and passed the inspection.
Texture: the powder is white, uniform in color and free of impurities.
Handle: It feels delicate and smooth, and is easily absorbed by the skin.
Smell: It smells slightly fishy, but there is no other peculiar smell.
Fake pearl powder: Fake pearl powder is generally made by heating mussel shells with alkaline water and lime, then removing the black on the surface, crushing, sieving and packaging.
Texture: take a small amount of powder with your fingers, spread it out in the sun or light and observe it carefully, and you can find obvious flash. This is mica.
Color: obviously whiter than pure pearl powder.
This fake pearl powder is mixed with hydrolyzed animal protein powder, and mica will stick to the stomach after long-term use.
Inferior pearl powder:
Texture: The main raw material of this powder is the powder drilled during pearl jewelry processing, mixed with talcum powder.
Color: yellowish, mainly caused by high temperature and high heat during drilling.
Smell: there is a burning or smelly smell when taking it.
Question 7: How can pearls tell the true from the false? How to identify the authenticity of pearl necklaces;
First, the friction method: real pearl necklaces will have a sense of sand when rubbed against each other. You can hear the rustling sound in your ears, and you can grind pearl powder with a little force; Because fake pearls are coated shells, coated shells will slip when rubbed, and pearl powder cannot be ground.
Second, look at the skin: even if the real pearl necklace is unified, there will always be a little difference in shape and color. False pearls are uniform in size and shape, mostly round, and their colors are often uniform. A layer of paint on the surface looks shiny and "fake".
Third, look at the pearl hole: the real pearl hole is flat and the boundary is clear; However, there are signs of wrinkles or eversion in the pearl holes of fake beads, such as the feeling of coating, which is very easy to judge and often cannot escape people's verification.
Question 8: How to tell if it is a real pearl necklace? 1. Friction method:
The true pearl is mainly composed of calcium carbonate, and its structure is concentric crystal layered (imbricate) structure, so two pearls rub against each other, and the true pearl is rough and sandy; In a quiet environment, if you rub against your ear, you can hear a slight rubbing sound (generally speaking, freshwater pearls have a stronger sense of friction than seawater pearls, and seawater pearls have a weaker sense of friction). Note: the friction should be gentle, and the pearl powder can be ground slightly, but not too hard. After that, you can gently wipe it with a professional cleaning flannel, leaving no trace.
Imitation/false beads are plastic films wrapped around plastic round cores, wax-filled glass round cores or shell grinding round cores. Or coated with a layer of pearlescent pigment. There are many kinds of components in this liquid, and they are increasing year by year. Guanine, a substance extracted from fish scales in previous factories, was dissolved (or suspended) in nitrocellulose liquid, and then the crystal of aluminum carbonate was improved. Because it is still the essence of the coating, it is not a real tile-like structure, so the two fake beads slide each other when rubbing, which feels greasy and has no sand feeling. It can be said that this is the * * * nature of all fake beads, and fake beads can't grind sand or powder. This method is very professional and easy to use, and will not destroy the pearl itself.
Remarks: It's best to go to a professional appraisal institution to identify seawater pearls. This method is not recommended. It's too late to regret.
2, intuitive method:
Real pearls have a natural color that radiates from the inside out. There are no two identical pearls in the world. In a good necklace, the color scheme is always uniform, but even if the size and color scheme are unified again, if you look closely at their size, shape, color or skin defects, you will always find a little inconsistency. Generally, surface defects or growth textures can be seen with the naked eye (except rare flawless Tahiti pearls and Nanyang pearls, which are almost invisible to the naked eye). Because they are natural products, they cannot be absolutely standardized as those cast by machine molds.
Imitation beads/false beads are the same size and shape, mostly round, with uniform color or halo, and the surface often has specular reflection effect. But the above points, high-quality pearl necklaces, as long as carefully matched, often look basically the same in shape and color, with strong luster and good mirror effect. Therefore, Pearl Beauty thinks that the intuitive method needs enough eyesight and experience to distinguish. If you still think that the luster of fake beads is halo-free and the surface is perfect, then out! In fact, the process of painting is deceptive and needs careful identification. Some fake beads, in addition to their true colors, may also see some paint halos, and some even press them up with a lathe, causing some natural flaws and textures similar to pearls on the surface. So, how to break through the visual discrimination method? Because the fake pearl is coated with a layer of paint, it looks more greasy than the real pearl visually. Of course, consumers who are new to pearls may not understand the concept of luster. Then you can look at this method again. If you look carefully in a well-lit place, you will often see needle-like defects on the smooth surface, which are very small, but you will find that they cover almost the whole surface. That's because the coating is uneven, and its coating structure is different from that of real pearls. Only from this point can we professionally judge that it looks "fake". However, there are not so many tiny needle-like defects on the surface of real pearls except the defective parts. Then, those fake beads pressed by machine tools are just so. If fake beads are flawed, they are not as terrible and difficult to distinguish as consumers think. This is often the best place to distinguish. The flaws, bumps and scratches of real pearls are generally natural and smooth. The defects of fake beads are often prone to wrinkles, eversion or uneven dents, which can be seen from the machine scraping. Therefore, don't think that defective fake beads are easy to deceive people. It is often the "defects" of fake beads that betray themselves.
Real pearls For pearl necklaces, you can observe the pearl holes, which are relatively flat and have clear boundaries.
Because the outer layers of imitation beads/fake beads are coated with pearl liquid paint or plastic film, it is difficult to escape the judgment of eyes when observing the bead holes of imitation beads chain. It is easy to cause uneven bead holes when imitating bead holes. If you look closely, it will be uneven, such as wrinkling, eversion or breakage. This method is also a unique skill, and it works well.
3. Touch method: (In the case of comparison, you can consider combining this method to judge that you may feel bad because of the influence of hot and cold weather and personal temperature ... >>
Question 9: How to identify the authenticity of pearls;
1, look at the color of pearls. The luster of natural pearls is like a seven-color rainbow. There are many colors, but they are not particularly bright, and the transparency is better when exposed to sunlight. On the other hand, the surface of artificial pearls is bright and monotonous, which looks unreal and has almost no transparency.
2. The feeling of pearls. Natural pearls feel smooth and cool, while artificial pearls are warm and greasy. At the same time, you can also scratch your nails gently. Real pearls will have the same powder as fine powder, but there will be no scratches. Moreover, artificial pearls will have obvious scratches. And there is no shedding material.
3. Judging from the shape of pearls. Natural pearls are formed by years of wind and sand in clam shells, so their shapes are not particularly regular. Fake pearls are generally round and exquisite in workmanship, but they have no medicinal value. And when choosing pearls, you can also pay attention to the holes of pearls. The holes of fake pearls may have peeling phenomenon.
4. Friction listening method. Two pearls can rub against each other, and the sound made by natural pearls will feel like a sandstorm, while artificial pearls will feel slippery.
5. The simplest price appraisal method. Natural pearls are very expensive. One hundred and two hundred dollars for a pearl.